First off, turn of the pulse and get it to welding correctly with regular mig. You did not say what your mig volts were. You should be in spray and it doesn't look like it. 100% argon? Oh and arc force should be set about at 7 to 8...back off from there. Volt are likely too low. You need about 23.5 to 24 V. You should probably be about 150 amps or so WHILE welding (wire feed will change to show welding amps). Aluminum needs volts and not amps. A 140 miller can spray arc aluminum wire easily with the voltage jacked up.
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